mathI'm having some troubles with these. Thanks in advance. If a>0 find the minimum value. If a<0 find the maximum value. 1. y=-x²+2x+5 2. y=-2x²-3x+4 These are functions for parabolas, so f(x)=ax²+bx+c when a does not equal 0 In both your examples, the &...
October 31, 2006

physicsAt a construction site, a brick fell and hit the ground at 24m/s a) from what height did the brick fall? b) how long was it falling? for a) i got 29.387m and for b) I got 2.448s I got a) by using v^2=v0^2 +2a(x-x0) for b) I used v=v0+at Did I do this problem correctly? If we ...
September 19, 2006

MathCan someone please help me with an algebra problem? -|4-8b|=12 I really get confused with the absolute value symbols and a negative sign outside of them. Don't worry about it; it does tend to be a bit confusing. I'll explain the difference between inside and outside ...
September 14, 2006

bay and penninsulaWhat is the difference between a bay and a penninsula? A bay is a body of water -- smaller than a sea or ocean or gulf -- that is not completely surrounded by land. San Francisco Bay is one good example. A peninsula is a land formation that is surrounded on all but one side by...
September 5, 2006